India has offered a follow-on order of additional Boeing manufactured 39 AH-64D Apache multirole combat helicopters at an estimated cost of over $2.5 billion. These are in addition to the already 22 AH-64D Apache helicopters which are currently being negotiated and likely to cost $1.4 billion and are to replace the Indian Air Force's ageing fleet of Soviet-era Mil Mi-35 helicopters. The additional helicopters that are to be procured will be for the Indian Army and some of which will be deployed as part of a new mountain division it is raising along the disputed border with China.